First, before I forget some info on how I created the video:
I lowered the resolution of my desktop, so the fonts would be easier to read in the video. I used 1024x768, but in hindsight I should have gone for a wide-screen format like 1280x720 to get rid of the black side bars in YouTube. (@Jill_Hardin: I think your video is great but it is hard to read the letters in ATLAS.)
I used the open source OBS Studio to capture the video. Note that by default it records at 60 frames per seconds (it is intended to record games). I set it to 30 fps.
I used Windows Movie Maker to edit the video and add narration. Unfortunately this software is discontinued, but happened to be readily available in my corporate environment. If anybody knows a good alternative please let me know.
I used Powerpoint to create the slides, saved them as image to insert them in the video. I'll upload the slide deck to the Wiki (the forums won't allow it to be uploaded here).